Valve control.



H. SLATER.

VALVE CONTROL.

APPLICATION FILED SEPT. a. 19:4.

1 ,1 84,1 43. Patented May 23, 1916.

I WITNESSES 38 Maw/511ml? I M (7m.

STATES HARVEY SLATER, OF CHICAGO, ILLINOIS, ASISIGNOR TO CHARLES F. ELMm ENGI- NEERING WORKS, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

VALVE CONTROL.

Specification of Letters Patent.

Patented May 23, 1916.

Application filed September a, 1914. Serial No. ssae'zo.

To all whom it may concern Be it known that I, HARVEY SLATER, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Valve Control, of which the following is a specification,

My invention relates to devices for controlling high pressures and particularly relates to valvular devices employed in controlling hydraulic machines, such as rams and presses which are subjected to extremely high pressures and the invention constitutes an improvement in the device illustrated in my Patent No. 1,143,236 granted June 15,

Heretofore great difliculty has been experienced with devices of this character subjected to high pressure largely on account of the difliculty in actuati'n the valves manually and the tendency o such valves to leak, andif made large enough-to operate easily under working conditions, the difliculty of controllin' the same readily and 1 rapidly, especially if the working parts are movement of a single operating handle or lever in such a manner as to open successively the different inlet valves or the exhaust or to close all the passages through the device gradually in each case, with fine regulation and control and without the exercise of more than ordinary precaution on the part of the operator.

A further object of my invention is to provide a construction in which a limited amount of independent movement is provided between the different valves of the device, which permits' the mechanism to be controlled easily, and at the same time, permits a certain amount of automatic adjust-' ment of the parts.

A further object of the invention is to provide means whereby devices may be open. to extremely high pressures without the neces'sity, of the valves overcoming thishigh pressure on their initial opening movement.

7 will be more fully set forth in the following The various other objects of the invention my invention, together with certain modifi catlons thereof, which consists in the new and novel features of construction and combinations of-parts hereinafter set forth and claimed.

In the drawings :the figure is a longitudinal sectional view through a preferred form of my invention particularly adapted for extreme high pressure work.

There is shown a casing 1, into one end of which is inserted a screw plug 2, which casing has a relatively low pressure inlet 3,

a machine supply port 4 and .an' exhaust 5,

disposed in order longitudinally of the side of the casing. The casing may also have a port 6 for connection with a pressure gage orother suitable indicator. The bore of the casing between the inlet 3 and the port 4has an apertured partition 7, forming a guide and seat for the main inlet controlling'valve 8, which valve has extendin therethr'ough one of the alined stems of a pilot valve 9, the other outwardly extending stem 10 of which is guided in a bore 11 extending through the plug 2 and is engaged by the compression spring 12', which acts upon the pilot valve and through the pilot valve on main valve 8, tending to maintain the same in closed position. The portion of the bore of the casing 1 be tween the port 4 and exhaust 5 is constricted to form a shoulder 13, anddisposedin this portion of. the bore is a guiding sleeve 14 bearing upon a packing 15, positioned between the sleeve 14 and the shoulder 13. Slidably mounted in the sleeve 14 and adapted to be brought into engagement with the upper stem of the pilot valve 9 and with the top of the main valve 8 is a sliding piston 16, having a passageway 17v extending therethrough and adapted to place the port 4 in fluid communication with the exhaust 5. A bonnet 18 is threaded into the end of the casing opposite the lug 2, the lower end 100 ed to close fluid communication through the provided. The length of the piston 16 is so proportioned that the main valve and pilot valve may move into closed position before the piston engages with the seat 19.

The bore 11 through the plug 2 constitutes an inlet conduit for the relatively high pressure fluid controlled by the device and is countersunk from the outer end .to form a cylindrical chamber 23 in which is fitted a barrel 24 one end of which constitutes the valve seat for the relatively high pressure controlling valve 25, which has a closing movement onto its seat in the direction toward the pilot valve 9.

The valve 25 has a stem 26 guided in the borell and terminating a short distance from the stem 10 of the pilot valve 9v when the valves are in their normal closing position. The barrel isheld in position by a ring 27 fitted into a peripheral groove therein, which ring is held in place by a coupling 28 threaded into the outer end ofthe plug 2. The coupling has a bore 29 constituting a continuation of the bore 11 and the inner end of'the bore 29 is countersunk to provide a spring housing and guide for the outer portions of the valve 25. A relatively strong spring 30 is contained within the housing and bears on the valve 25 to maintain the same firmly on its seat. The valve 25 is provided with a passageway 31 which places the bore 29 in communication with the portion of the bore 11 in advance of the valve seat and a plurality of by-passes 32 places the portion of the bore 11 in rear of this valve seat in communication withthe port of the bore 11 in ad- Vance of the main valve 8.

A one-way check valve 33 is placed in the inlet 3 to prevent the high pressure from passing in a reverse direction through said inlet.

With the parts in the position indicated, the valves 8 and 9 are in position closing communication between the inlet 3 and machine supply port 4 and the valve 25 is in position closing the high pressure inlet.

The piston 16 is in engagement with its seat 19, and the valve 21 is in position closing communication between the port 4 and exhaust 5. Rotating the handle 22 in a direction to move the screw rod 20 downward moves the piston 16 off its seat, and into engagement with the pilot valve 9, unseating the same and permitting the equalization of pressure on opposite sides of the main valve 8 and the continued movement of the piston 16 will act on the valve 8 to unseat the same, permitting the full head of pressure from thei-nlet 3 to pass the main inlet controlling valve. At this time, the valve 21 is in position, closing communication between the port 4 and exhaust 5.

A still further rotation of the rod 20 will cause the stem 10 to press on the stem 26 thereby to unseat the valve 25 controlling the high pressure inlet. The pressure of the fluid entering through the bore 29, by-

pass 32 and bore 11, being greater than the pressure through the inlet 3, will act to close the check valve and the higher pressure is open to the machine'port.

The actuating of the handle to move the screw rod 20 in the opposite direction will permit the pressure from the supply port 4 to act on theplunger to movev the same toward its seat, thus permitting first, the closing of the valve 25 by its spring 30 and then, the closing of the valves 8 and 9 in succession by their controlling spring 12. The valve 8 is completely seated, preferably just before the piston 16 reaches its seat, and at this time, the valve 21 is in position closing the passageway 17. A further movementof the rod 20 permits the piston to move into engagement with its seat, during which time the machine supply port is shut off from both the inlets and exhaust. A further movement outward of the screw rod will either positively lift the valve 21 from its engagement with the piston, or permit the valve to be raised by the pressure from the port 4 so that there will be free fluid communication with the machine supply port 4 to the exhaust 5 through the passageway 17.

By means of this construction, both the inlet valves and the outlet Valve can be closed and the pressure in the machine held stationary by movement of the handle which will permit the inlet valves to close without allowing the plunger to rise against its seat on the casing, whereby the outlet valve is also held in engagement with its seat in the piston. Since an independent stop is thus provided for the piston, the inlet valves each have an independent movement relative thereto, and to each other thus permitting the same .to close automatically when the pressure against the piston is released and allowing complete disengagement between these parts for any desired interval prior to the instant when the piston engages with the stop or shoulder in the casing. Consequently, it is possible to pack the piston in a simple and effective manner, since the packing is firmly held between the shoulder stationary with respect to the casing, and thus allowing the packing to be arranged so that the pressure from the machine will tend to make a tight joint. The pressure receiving areas, both of the different inlet valves and the outlet valve, are comparatively small, so that the pressure to be overcome in the movement of these valves is correspondingly decreased. V

Should it be desired to use only the pressure from the relatively low pressure. inlet' this main valve being spaced from the high pressure controlling the valve 25 so that a material movement is necessary before the extreme high pressure inlet is opened.

By means of .a device of this character it .is possible to open the machine to extremely straight line movement in the direction of.

feed of the rod so that all of the manual force exerted on the handle is directed straight against the difi'erent inlet valves.

The difl'erent valve carrying elements may be removed as units in case it should become necessary to repair or replace the valves or grind the valves and their seats;

While but twoinlets have been shown it is obvious that with the necessary mechanical changes in construction, any number of inlets may be arranged to be successively opened to the devices and it is obvious that various other changes within the skill of the mechanic may be made without departing from the spirit'of my invention, provided the means set forth in the following claims be employed.

' Having thus described my invention, I claim 1; In a valve mechanism, the combination with a casing having a machine supply port, a relatively low pressure inlet and an exhaust, a normally closed main valve for said inlet, a floating piston between said, port and exhaust, an exhaust controlling valve, a relatively high pressure inlet and a normally closed valve for said high pressure inlet, of means adapted to be moved in one direction to move said piston from an inoperative position into engagement-with said main valve to open the same, and to move said main valve to ,open said high pressure valve,'said means being adapted to be moved in a reverse direction into position to form a stop for said floating piston-in its movement out of valve opening engagement with said inlet valves and adapted to be moved into another position to permit,

unseating of said exhaust controlling valve.

2. In a valve mechanism, the combination with a casing having a machine supply port, a plurality of pressure inlets to said port, a normall closed main valve controlling all of said inlets, a normally closed pilot valve for equalizing pressures between said port and said inlets, a supplemental valve for controlling one of said'inlets, of an actuating means movable in one direction to open successively said pilot valve, said main valve and to move said pilot valve into position to open said supplemental valve in order.

supported by said plug,

3. In a valve mechanism, the combination with a casing having a bore extending therethrough, a machine supplyport, a low pressure inlet and an exhaust communicating with said bore, a screw plug in one end of said bore, a main inlet controlling valve a bonnet having a screw rod closing the other end, guiding means within said bore between said bonnet and said port, a high pressure conduit through said plug, 'a valve controlling said high pressure conduit, a floating. piston guided in-said means and adapted to actuate said main valve and said high pressure valve in succession and an exhaust controlling valve operatively engaged by said screw rod to actuate said piston.

4. In a valve mechanism, the combination with a casing having a bore extending therethrough, provided with a machine supply .valves, an'exhaustcontrolling valve adapted to be moved by said screw rod to unseat valve.

. said piston and actuate said inlet controlling 5. In a valve mechanism, the combination with a casing having a bore extending therethrough, a machine supply port, a low pres- .sure inlet and an exhaust leading to said bore, of a spring pressed inlet controlling valve in said bore between said low pressure inlet and port, a high pressure inlet leading to said bore, a valve controlling said high pressure inlet, a floating piston in said bore having a passageway extending therethrough placing said port in fluid communication with said exhaust, and a manually controlled valve for said passageway to move said piston into position to open said low pressureinlet controlling valves and to move, said low pressurecontrolling valve into position to open saidhigh pressure controlling valve.

6. In a valve mechanism, the combination of a casing having a machine supply port, a plurality of pressure inlets and an exhaust, a" spring pressed inlet controlling valve, a main inlet controlling valve, one

of said inlets opening to the bore between said valves, a floating piston having means for placing said port in communicatlon'with said exhaust, a stop for said piston, an exhaust controlling valve, and a screw rod adapted to actuate said exhaust controlling valve and to move said piston out of engagement with said stop and into operative engagement with said 1nlet controlling valves to open the same successively.

7 In a valve mechanism, the combination with a hollow casing having a low pressure inlet, a machine supply port, and an exhaust disposed in order longitudinally of the casing, of a normally closed valve between said low pressure inlet and said port, a sliding piston between said port and exhaust having means for placing said port and exhaust in fluid communication, a valve adapted to engage said plston controlling said exhaust, manually actuated means adapted to act on said exhaust controlling valve to close communication-between said port and exhaust, and adapted to move said piston into engagement with said low pressure inlet controlling valve to open the same,

-a check valve in said low pressure inlet preventing communication therethrough from said high pressure inlet, a normally closed, valve controlling said high pressure inlet controlled by the movement of said manu-- ally actuated means for opening said high pressure controlling valve.

8. In a valve mechanism, a casing having a bore extending therethrough, a machine supply port and a pressure inlet to said bore,

a plug disposed in one end of said bore, said bore being restricted between said ports to form a valve seat, a main valve guided in said restricted bore and normally resting against said seat, an auxiliary valve positioned in said main valve and having a stem extending therefrom past said inlet port and guided in said plug, a spring completely housed within and removable with said plug and acting onsaid stem tending to maintain said auxiliary and main valves in position closing communication between the in-' let and machine supply ports, a second inlet through said plug, a valve controlling said second inlet, a spring housed in said plug for tending to maintain said second valve in closed position and manually controlled means bodily movable in the unseating directions of said valves to move into successive ositions thereby to open communication etween the inlets and the port.

9. In a valvemechanism, a casing having a bore extending therethrough, a removable plug at one end of said bore, a bonnet having a screw rod closing the other end,said

casing having a machine supply port and a.

plurality of pressure inlets, the bore being reduced between said port and inlets to form a valve seat, a main valve bearing on said seat, an auxiliary valve within said main valve resiliently supported from said plug and removable therewith, a second inlet conv trolling valve contained in said plug and removable therewith, a piston adapted to be moved by the actuation of said screw rod into position to open said auxiliary and main valves in succession, and said auxiliary valve adapted in its opening movement to open said second valve, an exhaust from said bore and a valve for controlling said Signed at Chicago, in the county of Cook' and State of Illinois this 26 day of August A. 11,1914. p :HARVEY SLATER.

Witnesses:

HAROLD GEE, CHAs. JoHNsoN. 

